Right now I have about 40 roses, and I plan to have about 40 more before spring ends. I need recommendation for something that I can put in a pump sprayer, that will not only keep these god forsaken bugs off, it will hopefully keep them disease free also. I'm very prone to black spot here. I don't have a preference as to whether it's organic or heavy chemical, as long as it works. You all have been super helpful, and I'm Hopeing you can help me one more time! Bonus points if I can easily pick it up from a big box store today!